Lei de Charles
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
Charles
About this calculator
Charles's Law describes the relationship between the volume and temperature of a gas at constant pressure. Using the formula V₁/T₁ = V₂/T₂, volume is directly proportional to absolute temperature. This calculator helps predict gas volume changes with temperature variation, or vice versa, in contexts like laboratories, engineering, and thermodynamics studies.
To use the calculator, input two of the three values (V₁, T₁, V₂, or T₂) and it will compute the third. Ensure temperatures are converted to kelvin (K = °C + 273.15) before applying the formula. The law applies only to ideal gases and when pressure remains constant during measurements.
Example: If a gas balloon occupies 2 liters at 300 K and the temperature rises to 350 K, the calculator shows the new volume is approximately 2.33 liters. If pressure is not constant, other gas laws like Gay-Lussac's Law should be applied.
Frequently asked questions
When should I use Charles's Law?
Use it when predicting gas volume or temperature changes at constant pressure, such as in weather balloons or refrigeration systems.
Do I need to convert Celsius to Kelvin before using the calculator?
Yes. The formula requires absolute temperature in Kelvin (K = °C + 273.15) for accurate physical results.
Does this calculator work for liquids or solids?
No. Charles's Law applies only to ideal gases, not other states of matter.
What if pressure is not constant?
Use other gas laws like Gay-Lussac's Law (pressure vs temperature) or Boyle's Law (volume vs pressure).